haikuwebkit/LayoutTests/css3/filters/effect-contrast.html

<script>
if (window.internals) {
    // Force software rendering mode.
    window.internals.settings.setAcceleratedCompositingEnabled(false);
}
</script>
<img style="filter: contrast(0)" src="resources/reference.png">
<img style="filter: contrast(0.5)" src="resources/reference.png">
<img style="filter: contrast(1.0)" src="resources/reference.png">
<img style="filter: contrast(2)" src="resources/reference.png">
<img style="filter: contrast(5)" src="resources/reference.png">
<img style="filter: contrast(10)" src="resources/reference.png">